234 TEN YEARS IN SWEDEN. 



Gen. PteromySj Geoff. 



Form like the squirrel, but tlie tail is shorter the ears 

 scarcely apparent ; and the skin between the front and hind 

 legs forms a kind of web, which the animal can expand as it 

 floats through the air. Must not, however, be confounded 

 with the flying squirrels of Australia, which belong to the 

 genus petaurus, and have a totally different form of den- 

 tition. 



55. PTEEOMYS YOLANS, Desm. Mygande Ekorre. The 



Flying Squirrel. F. 



Length 6 in. 6 1. ; tail, without the hair, 4 in. 2 1. 

 Colour, above pale shining grey ; under white. 

 Can hardly be included in the Scandinavian fauna, 

 although, according to Linne, it was in his time met with in 

 Swedish and Norwegian Lapland. Not a specimen, how- 

 ever, appears to have been killed in either country since 

 then. 



Sciurus. 



Tail longer than the body ; ears standing far out of the 

 fur ; skin on the sides sits closely to the body. 



56. SCIURUS VULGARIS, L. Allman Ekorre. The Squirrel. 



D. F. 



Ears with a long-pointed hair tip. Body above and 

 tail of the same colour in summer ; red-brown in winter ; 

 more or less grey according to the latitude in which 

 they are met with. Length about 8 in. ; tail 9 in. 

 Common in all the Scandinavian forests, from the extreme 

 south to far within the polar circle. 



Fam. 3. PALMIPEDIA. 



Molars -, compound with flat summits. The three middle 

 toes on the hind foot joined by a web. Tail horizontally 

 flattened, bare. 



Gen. Castor j L. 

 Tail flat, broad, scaly ; ears very short ; five toes on 



